Proxies for paleo-oxygenation: A downcore comparison between benthic foraminiferal surface porosity and I/Ca

Proxies for paleo-oxygenation: A downcore comparison between benthic foraminiferal surface porosity and I/Ca

Benthic foraminiferal surface porosity (the mean percentage of surface area covered by pores; higher porosity: lower oxygenation) and iodine to calcium ratio (I/Ca, higher I/Ca: higher oxygenation) are both promising paleoceanographic proxies that will advance through testing in down-core studies. H...

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Veröffentlicht in:Palaeogeography, palaeoclimatology, palaeoecology palaeoclimatology, palaeoecology, 2021-10, Vol.579, p.110588, Article 110588
Hauptverfasser: Lu, Wanyi, Barbosa, Catia F., Rathburn, Anthony E., Xavier, Priscila da Matta, Cruz, Anna P.S., Thomas, Ellen, Rickaby, Rosalind E.M., Zhang, Yi Ge, Lu, Zunli
Format: Artikel
Sprache:eng
Schlagworte:
Benthic foraminifera
Bottom water
Iodine
Oxygen
Surface pores
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Zusammenfassung:Benthic foraminiferal surface porosity (the mean percentage of surface area covered by pores; higher porosity: lower oxygenation) and iodine to calcium ratio (I/Ca, higher I/Ca: higher oxygenation) are both promising paleoceanographic proxies that will advance through testing in down-core studies. Here we report the first down-core comparison (~45 kyr) of these proxies for a core from the southern Brazilian margin (26°40.22′ S, 46°26.46′ W, 475 m water depth). Both proxies are most sensitive to low-O2 conditions (
ISSN:0031-0182
1872-616X
DOI:10.1016/j.palaeo.2021.110588